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All Journal Industrial and Systems Engineering Assessment Journal (INASEA) ComTech: Computer, Mathematics and Engineering Applications ANIMA Indonesian Psychological Journal Scientica: Jurnal Ilmiah Sains dan Teknologi
Ho Hwi Chie
Binus University
Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Mathematics Social Sciences Other

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Journal : ComTech: Computer, Mathematics and Engineering Applications

 1 
Penerapan Metode DMAIC dalam Peningkatan Acceptance Rate untuk Ukuran Panjang Produk Bushing Chie, Ho Hwi; Hartoyo, Ferdian; Yudhistira, Yudha; Chandra, Andry
ComTech: Computer, Mathematics and Engineering Applications Vol 3, No 2 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i2.2333

Abstract

Bushing is one of the eminent product of PT Indokarlo Mighty. The company requires some suppliers of iron cutting services to continue providing high qualified raw materials. The quality is the accuracy of the intended length of the products which is able to meet the requirements of the requested length. The purpose of this study is to determine what factors caused the defect on the length of the products. In addition, it is objected to provide appropriate solutions to eliminate to the factors, so that the number of defected products can be reduced. This study uses the methodology of Six Sigma improvement models Define-Measure-Analyze-Improve-Control (DMAIC) to make improvements in the quality of services provided by PT Argatama Multi Agung, while the improvement phase uses Design of Experiment (DOE) to find the machine configuration that can produce the best quality products. A significant increase in sigma is obtained from the conducted research.
Pengujian Skala Pengukuran Kelelahan (Spk) pada Responden di Indonesia Zuraida, Rida; Chie, Ho Hwi
ComTech: Computer, Mathematics and Engineering Applications Vol 5, No 2 (2014): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v5i2.2357

Abstract

Subjective fatigue measurement instruments, based questionnaire, is a measure that is widely used for reasons of practicality and measurement results can be obtained quickly. For the purposes of measuring fatigue, there are a number of questionnaires commonly used abroad, but not a lot of literature with a case study in Indonesia that utilize this instrument. Of course, the reason for the use of the instrument is based on the expectation that the instrument has high validity and reliability, and if possible to have a high level of practicality as well. Asssment Fatigue Scale (FAS) is one of the suggested use as a measurement of worker fatigue. The instrument consists of a 10 item questionnaire with good reliability level. The discussion in this paper covers Measurement Scale Fatigue testing results via questionnaires measuring fatigue, adapted from the FAS in English and translated into Indonesian. DSS consists of 10 questions using 5 Likert scale, for the answer options are: never (1), sometimes (2), perceived a regular basis (3), is common (4), is always experienced (5). Relaibilitas test results using Cronbach alpha values obtained value of 0812, and can be improved if the item is question number 3 is removed. By implication, this questionnaire is good enough to use as a measuring instrument fatigue, but the level of proficiency in Indonesian language, in this CMS, needs to be repaired, especially for question number 5 and 3 if the level of validity and reliability to be improved, although the increase may not be too significant.
Porcelain Product Quality Analysis in PT XYZ Chie, Ho Hwi; Nasution, Januar; Ayu, Ketut Gita; Septivani, Nike; Renaldi, Yualfin
ComTech: Computer, Mathematics and Engineering Applications Vol 6, No 4 (2015): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v6i4.2195

Abstract

PT. XYZ is a company engaged in manufacturing porcelain dinner ware such as plates, cups, teapot, bowl, etc Porcelain product is safe for use and product defect will only affect the aesthetic not the functional side. The company always maintain the quality of the products produced as by maintaining a good product, in terms of visuals, will keep customers interested in the product. Good quality products characterized by quality A / B and C, and the product defect characterized by the quality of D, Lost, and BU. Concepts and methods used to analyze is a statistical process control (SPC) which includes Pareto diagram, fraction nonconformities, flow charts and fishbone diagrams and management tools (fault tree analysis). Statistical Process Control (SPC) is one of the methods, which includes Pareto charts, fraction nonconformities, flow chart, and fishbone diagram and also management tools (fault tree analysis). SPC is useful to find the facts from the problems and factors that affect the quality of the products, while fault tree analysis is useful to analyze each of the production process.
Pengendalian Kualitas Produk Lembaran Serat Semen Rata di Pt Bakrie Building Industries Dengan Metode DMAIC Chie, Ho Hwi; Ambadar, Muhammad Zaky; Hidayat, Wahyu; Abdillah, Sutan Rieza
ComTech: Computer, Mathematics and Engineering Applications Vol 1, No 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2697

Abstract

Producing quality products to match customer expectations is an important thing that needs to be done by every company that produces any product, to gain public appreciation and sell their products on the market. Therefore companies need to have a strong commitment in improving and maintaining product quality. The study related to product quality of flat sheets of fiber cement or more commonly known as versaboard produced by PT. Bakrie Building Industries show that there are 9 (nine) types of defects that can degrade the quality of production. Most dominant defects occured on 3 (three) versaboard products, the crack (2.03%), broken end (0.80%) and side trim (0.35%) during observation. Sigma level of products is obtained at 4:16 at a cost saving of due to defects of Rp.14.645.600, 00. Defects that occur tend to be caused by methods, people, machines, and materials used. Efforts to reduce the level of defects are done by making the SOP of the break-up method, and manufacture of cutter flow diagram. REBA score calculation results (Rapid Entire Body Assessment) in the removal and break-up reduction is obtained at 8 with a high level of risk should lead to improving the position of the operator using the Rapid Entire Body Assessment (Reba) so that operators can work more carefully and responsibly.. 
Penerapan Metode Dmaic dalam Peningkatan Acceptance Rate untuk Ukuran Panjang Produk Bushing Hartoyo, Ferdian; Yudhistira, Yudha; Chandra, Andry; Chie, Ho Hwi
ComTech: Computer, Mathematics and Engineering Applications Vol 4, No 1 (2013): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v4i1.2761

Abstract

PT Argatama Multy Agung is one provider of metal cutting services using turret machine. The quality of metal cutting services offered are still questioned. The quality service intended is that the length accuracy of the outcome product meets the requirements of the requested length. The purpose of this study is to determine what factors lead to defects the goods length, as well as to provide the right solution that factors can be eliminated so that the number of defective products can be reduced. In this research authors implement Six Sigma methodology with an improved model of Define-Measure-Analyze-Improve-Control (DMAIC) to perform improvement in the services quality provided by PT Argatama Multy Agung. On the improvement phase Design Of Experiment (DOE) is used to find the machine configuration that can produce the best quality. From the research conducted, a significant increase of sigma is obtained. 
Co-Authors Abdillah, Sutan Rieza Ambadar, Muhammad Zaky Armansyah Armansyah Chandra, Andry Dyah Lestari Widaningrum Hartoyo, Ferdian Ketut Gita Ayu Nasution, Januar Nike Septivani Renaldi, Yualfin Rida Zuraida Wahyu Hidayat Warman, Sa Arjun Adi Yudhistira, Yudha